1) We've been told that there two functions, so let's equate them to find the value of x, which is common to both functions.
f(x) = g(x) Plug into that the whole function
3x+7 =2x +12 Subtract 7 from both sides
3x =2x +12 -7
3x = 2x +5 Subtract 2x from both sides
3x -2x=5
x =5
2) Hec